Universal Audio Bock 251

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Universal Audio Bock 251

Universal Audio

Bock 251

4.6 Expert Rating

Product Info

Article Number: 558715
Model: Bock 251
Price: $7,258.90

* Prices may vary. Check retailer for current pricing and availability.

The Bock 251 is a serious mic, plain and simple. It nails that classic, European vocal sound—think dusty jazz vocals or intimate female leads—with a gorgeous, present midrange. If you’re a producer or engineer chasing a specific, high-end vibe and have the budget, this is a game-changer.

Product Description

  • Universal Audio Bock 251
  • Multi-Pattern Large-Diaphragm Tube Condenser Microphone
  • Switchable polar pattern: omnidirectional
  • cardioid and figure-of-eight
  • Frequency range: 10 - 18
  • 000 Hz
  • +/-2 dB
  • German-made CK12 capsule and Cinemag transformer
  • Max SPL: 118 dB SPL
  • 1% THD
  • NOS ECC85 tube
  • Dimensions (L x diameter): 216 x 52 mm
  • Handmade in the UA Custom Shop in Santa Cruz
  • California
  • Incl. UA Bock 251 PSU true-linear power supply
  • microphone shock mount and premium vintage-style case
PROS
  • • Authentic CK12 capsule delivers stunning, vintage-inspired character
  • • Cinemag transformer adds warmth and subtle harmonic richness
  • • True-linear PSU ensures clean, consistent power and headroom
  • • Handmade build quality guarantees exceptional durability and longevity
CONS
  • • Premium-priced, a significant investment for most studios
  • • Somewhat heavy, requiring a sturdy stand for optimal performance
  • • Limited frequency response compared to some modern, extended-range mics

Product Video

Key Features

Mic Type Large-Diaphragm Tube Condenser
Polar Pattern Omnidirectional, Cardioid, Figure-8
Frequency Range 10 Hz - 18 kHz
Max SPL 118 dB SPL
Sensitivity -37 dBV/Pa (1.8 mV/Pa)
Connector XLR
Weight 1.4 kg

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Frequently Asked Questions

Universal Audio’s version maintains the sonic essence of the original while benefiting from UA’s manufacturing precision and improved PSU design.
Yes, the ECC85 is standard, though NOS tubes are preferred for vintage tone. Alternatives from Telefunken or Mullard are popular choices, but experiment to find your sweet spot.
While exceptional on vocals, it's also superb on acoustic guitars and pianos, lending a warmth that's often missing with brighter mics. However, its focused character isn't universally suited to every instrument.

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